B00I13N9NI Yamaha SB7Xc Silent Brass System for Trumpet

Internal Microphone: Electric condenser microphone, Pickup Output Jack: Mini phone jack
Nominal Level: -25dB to -35dB, Brass Resonance Modeling: Yes
Power Supply: AA alkaline or nickel-metal hydride batteries x 2 (3V DC) sold separately
Control:. Volume, Reverb type, Power ON/OFF
The Pickup Mute combines a high-performance mute with an internal microphone to pickup sound